Whenever I have a bubble I point the needle down to the floor then tilt it back it to the ceiling when I do that the bubble moves like in a level
If u do it right when u point the needle down bubble goes to the plunger end .. When u face it the other way bubble it on the end with the needle then u push the air bubble out and a tiny oil will come out as well
small bubble when you pull back is normal as since you just created a vacuum some of the dissolved air is release. It will reabsorb when you put pressure back on it. Also as long as you are not right in a vein a small bubble won't matter.
small bubble when you pull back is normal as since you just created a vacuum some of the dissolved air is release. It will reabsorb when you put pressure back on it. Also as long as you are not right in a vein a small bubble won't matter.
Use the bubble to your advantage, it helps get all the oil out of the syringe, and stop before you push the air in, even then you can push the air in wont really do shit.